31 .We keep _______ touch _______ my parents .填介词

31 .We keep _______ touch _______ my parents .填介词 We should keep our classroom _______(clean). keep away from;keep out;keep off;keep up的意思?We can often see the notice_______ the grass in the park.A.Keep away fromB.Keep outC.Keep offD.Keep up请问他们的意思分别是? _______ singing beautiful songs ,we also have other ways ______ us happyA.except to keep B.beside ,to keep C.but ,keep D except,kept we will keep going 英语选择题（写理由）---We should do something _______ our environment ______.A.keeping,cleaned B.to keep,being cleaned C.to keep clean D.keeping,cleaned 这个keep后跟哪个介词…Books are the most important records we keep _______ man's thoughts ideas and feelings.A.upB.ofC.forD.on we must keep quiet in the reading room.(保持原句意思不变）We must keep quiet in the reading room.(保持原句意思不变）We _______ _________ in the reading room. If we want to keep healthy ,we should take part in _______ sports ___running ,swimming and skating.A.such ; as B.such ; like选哪个呢, we must keep our classroom( ). we want to keep fit We must keep ____(health) Should we dietto keep fit do we keep you informed? Let's keep it _______ feeling cold. Why is the horse _______(keep run)? Must wu do shomthing to keep our city clean?_______ a.yes we need b no you needn'tc.no you musn't d.yes of couse Please don't spit _______. We should keep our city clean.A.anywhere B. everywhere选哪个?为什么?尽量详细,不要只给词义.谢!